Based on the tensile experimental data and fracture morphology analysis,it was found that with temperature increasing and strain rate decreasing,the stress-strain curve declined.The tensile behavior of CP-Ti was temperature softening and strain rate hardening,and temperature sensitivity of tensile behavior was higher than strain rate sensitivity.Based on the variation of strength parameters of CP-Ti with temperature and strain rate,the correlation equations of strength parameters,temperature and strain rate were obtained.In order to select a reasonable constitutive equation to describe the temperature and strain rate sensitivities of stress strain curve of CP-Ti,the applications of Arrhenius equation,Johnson Cook(JC)equation and Modified Zerilli-Armstrong(MZA)equation on the tensile behavior of CP-Ti at low and intermediate temperatures were compared.It was found that,the Arrhenius equation had the highest prediction accuracy; MZA equation had the second highest prediction; JC equation had the lowest prediction accuracy.